Logging equipment and hydraulic excavators

Abstract

To provide a logging machine that securely holds the tree to prevent it from getting caught in the cutting unit's cutting mechanism due to the tree shaking during cutting, or slipping due to load or vibration, while also having a simple structure with fewer parts and without increasing the overall size of the logging machine. [Solution] The tongs 36 consist of a pair of side plate portions 36a, and the movable tong bucket 41 consists of a pair of bucket side portions 44. As the wood 71 becomes thinner towards the top, biting blades 40 are formed on the lower side plate portion 36a and the bucket side portion 44, so that the biting blades 40 bite into the wood 71 by a distance L1. Above the wood 71, there are no gaps between the upper side plate portion 36a and the wood 71, and between the upper bucket side portion 44 and the wood 71, so the wood 71 does not wobble, and the grapple unit 31 of this embodiment can securely hold the wood 71.

Claims

1. A logging machine equipped with a grapple unit capable of gripping trees, The grapple unit comprises a base frame that forms the main body, tongs pivotably mounted on the base frame, a movable tong bucket or movable tongs pivotably mounted on the base frame opposite the tongs, an opening and closing cylinder for opening and closing the tongs and the movable tong bucket, a link for linking the tongs and the movable tong bucket or movable tongs, and a cutting unit provided on the base frame for cutting wood. The tongs are provided with a pair of side plates that are provided parallel to each other on the left and right sides of the base frame, The movable tong bucket and the movable tong are provided with a pair of bucket side portions that are facing the side plate portion and are provided parallel to each other on the left and right sides of the base frame, respectively. The inner edge of the side plate portion and the inner edge of the bucket side portion on the side where the cutting unit is provided are equipped with a cutting blade that tapers towards the end. When the base frame, the tongs, and the movable tong bucket or the movable tongs are used to grip the entire circumference of the wood, the biting blades are configured to bite into the wood. The aforementioned cutting blade comprises an inclined surface that slopes toward the end only on the outward side in the width direction of the grapple unit, and an end surface formed at the tip of the inclined surface that becomes the edge of the original side plate portion and the bucket side portion, and is characterized in that the tip is formed smoothly without irregularities when viewed from the side.

2. A logging machine equipped with a grapple unit capable of gripping trees, The grapple unit comprises a base frame that forms the main body, tongs pivotably mounted on the base frame, a movable tong bucket or movable tongs pivotably mounted on the base frame opposite the tongs, an opening and closing cylinder for opening and closing the tongs and the movable tong bucket, a link for linking the tongs and the movable tong bucket or movable tongs, and a cutting unit provided on the base frame for cutting wood. The tongs are provided with a pair of side plates that are provided parallel to each other on the left and right sides of the base frame, The movable tong bucket and the movable tong are provided with a pair of bucket side portions that are facing the side plate portion and are provided parallel to each other on the left and right sides of the base frame, respectively. The inner edge of the side plate portion and the inner edge of the bucket side portion on the side where the cutting unit is provided are equipped with a cutting blade that tapers towards the end. When the base frame, the tongs, and the movable tong bucket or the movable tongs are used to grip the entire circumference of the wood, the biting blades are configured to bite into the wood. The aforementioned cutting blade is characterized in that it has an inclined surface that slopes toward the end only on the outer side in the width direction of the grapple unit, and its tip is acute, and the tip is formed smoothly without irregularities when viewed from the side.

3. A logging machine according to claim 1 or claim 2, The logging machine is characterized in that the base frame is provided with a protruding anti-slip portion at the position where the tree comes into contact when gripping the tree, in order to prevent the tree from slipping.

4. A hydraulic excavator characterized by being equipped with a logging machine according to claim 1 or claim 2.

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